CVE-2026-53217

Description

In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: sync RX data at the hardware packet offset mvpp2 programs the RX queue packet offset, so hardware writes received data at dma_addr + MVPP2_SKB_HEADROOM. The current CPU sync starts at dma_addr and only covers rx_bytes + MVPP2_MH_SIZE bytes, which syncs the unused headroom and misses the same number of bytes at the packet tail. On non-coherent DMA systems this can leave the CPU reading stale cache contents for the end of the received frame. Use dma_sync_single_range_for_cpu() with MVPP2_SKB_HEADROOM as the range offset so the sync covers the Marvell header and packet data actually written by hardware.

References

• https://git.kernel.org/stable/c/180235600934bef6add3be637c296d6cf3272e67
• https://git.kernel.org/stable/c/19f8bc139e9b149d1e5bf75ae761d1bb8dd3e7d8
• https://git.kernel.org/stable/c/23548007b3c66d628fc7d6b80d1e23be04ea10d9
• https://git.kernel.org/stable/c/60412bdd1b2576659eac23a23d2d9ff96228a643
• https://git.kernel.org/stable/c/a13199fa224e9f776f4005d5037df03aa9ea8f37